When option gmt_offset is blank, wordpress will give a 500 error

[silvanthus]

If for any reason the gmt_offset option is "", wordpress will give a type error:

A non-numeric value encountered in /wp-includes/functions.php on line 70 and 162

This can then only be solved by editing the database or reinstalling wordpress as the settings page cannot be loaded.

If a default value would be set (e.g. 0), the user can fix the problem in the settings page.